Please see the following notes and test with rwbuilder.sh as well.
Getting REP-3000 REP-0069 REP-58101 When Running rwbuilder.sh In Oracle Applications R12 (Doc ID 558188.1)
Troubleshooting Tips For REP-3000 Error when Running E-Business Suite PDF/POSTSCRIPT/HTML Reports (Doc ID 207532.1)
Rep-3000 , REP-69 When Running any Reports on E-Business Suite 12.0.4 (Doc ID 729849.1)
We are in R12.2.7 above hits doesn't applicable to us.. already looked over.
12.2.7 still uses the same 10.1.2 forms/reports as all previous R12 versions. The following note is good through 12.2:
11i-12 How To Perform Quick Checks for REP-3000: Internal Error Starting Oracle Toolkit (Doc ID 364838.1)
Thank you very much!! following the above docs resolves our issue.
Awesome! Please mark the post correct which held the solution for you so future readers will know what was helpful.